Xanthomonas campestris pv. campestris str. 8004

The Xanthomonadaceae are a family of Gram negative bacteria belonging to the order Xanthomonadales in the gammaproteobacteria. They are typically characterized as environmental organisms and are found in soil and water, as well as plant tissues. Many Xanthomonadaceae, especially species from the genera Xanthomonas and Xylella, cause plant diseases. Only one, Stenotrophomonas maltophilia, has isolates known to be opportunistic human pathogens.Xanthomonas campestris pv. campestris causes black rot, which affects crucifers such as Brassica and Arabidopsis. Symptoms include marginal leaf chlorosis and darkening of vascular tissue, accompanied by extensive wilting and necrosis. This bacterium is grown commercially to produce the exopolysaccharide xanthan gum, which is used to control viscosity and as a stabilizing agent in many industries. (HAMAP: XANCP)